If you’ve got an iPhone 17, a Google Pixel 10 Pro or a Galaxy S25 Ultra, you won’t need to worry about the age of your battery for at least a few years. But batteries do age over time so if you have a much older iPhone or an old Android phone, you may well find that your battery no longer gives you the same battery life it did when it was new. But having an old, worn-out battery doesn’t mean buying an altogether new phone; it’s surprisingly simple to just replace the battery.
It took a little over an hour, but I was able to safely swap out the battery and get the iPhone 6 running perfectly again. I’m not giving step-by-step instructions here — head to iFixit and grab a kit if that’s what you’re after — but I do want to describe my experience, including how easy the process was, and hopefully answer some of the questions you may have if you also need a new battery.
Note that any maintenance you do on your own devices is entirely at your own risk.
Batteries age over time, and considering that the iPhone 6 was released years ago, it’s no surprise that the one I bought wasn’t running in prime condition. One time, the phone unexpectedly restarted while in use, and it flashed a warning that read, “This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power. Performance management has been applied to help prevent this from happening again.” Even the phone itself knew it had a bum battery.
In short, a phone’s performance can be throttled if it can no longer cope with power demands. There is the option to turn throttling off, but this will result in more frequent crashes. Neither situation is ideal, so a battery replacement seemed like a smart way forward for me, since it wasn’t my main phone and I was willing to take the risks.
3. What comes in the iFixit battery fix kit?
iFixit’s kit comes with a third-party replacement battery that is not from Apple, since Apple does not sell its parts separately for phones older than the iPhone 12. It also has all the tools needed to open the phone and remove the old battery. The only additional thing I needed was a hair dryer to heat up and remove the glue.
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